Yes, abortion is murder, and I think it should be punishable in most cases.
Someone CAN be charged with manslaughter if they punch a pregnant woman and she miscarries... If a woman intentionally causes herself to miscarry... yes, that should be manslaughter. If a woman simply miscarries the baby, that would be just like a person getting sick and dying. Her body TRIED to take care of the baby and failed. Just like you may TRY to take care of a sick child and fail. That's not murder or manslaughter, that's an accident.
as far as Ectopic pregnancies... that IS still killing someone, but it would be catagorized as self-defense and not punishable.
... but if you're a teenager and you get pregnant, but you don't want your mommy and daddy finding out you're having sex, so you kill someone to hide the evidence... you've committed murder whether you killed the baby to hide the evidence, or you kill the boy you slept with so he "can't tell." Both should be punishable.
I don't think it should result in the death penalty... but I've said for a while... if you have an elective abortion, it should come with a hysterectomy.
The only exception would be for rape. Although I would encourage the mother not to punish the child for what the father's done... I think abortion shouldn't be punishable IF the mother agrees to press charges against her rapist. If you're not willing to press charges, it's not rape. Period.